Lanthanoid, Transitional, Photoluminescence spectra, Trigonal

• Eu-O-S-Y
• B-Ce-Lu-O-Sc
• Al-B-Eu-O-Y
• B-Ce-In-O-Sc
• Bi-Na-O-Pr-Ti
• rare earth
• lanthanoid
• transitional
• luminescent
• chalcogen